What is Google's thinking about links from article marketing, widgets, etc?
Back in 2013, Google had issued a warning for all webmasters related to widgets links which are against its guidelines. Google shared that “Widgets can enhance any website experience but on the other hand, some widgets contains unnatural low-quality keyword-rich links which can impinge the website experience which is harmful for website’s health and considered as violating the Google Webmaster Guidelines.”
Google has long taken a strong stance against links that manipulate a site’s PageRank. Today we would like to reiterate our policy on the creation of keyword-rich, hidden or low-quality links embedded in widgets that are distributed across various sites. Widgets can help website owners enrich the experience of their site and engage users. However, some widgets add links to a site that a webmaster did not editorially place and contain anchor text that the webmaster does not control. Because these links are not naturally placed, they're considered a violation of Google Webmaster Guidelines.
Google's webspam team may take manual actions on unnatural links. When a manual action is taken, Google will notify the site owners through Search Console. If you receive such a warning for unnatural links to your site and you use links in widgets to promote your site, we recommend resolving these issues and requesting reconsideration.